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Qu'est-ce (qui) est involucre - définition
MODIFIED OR SPECIALIZED LEAF, ESPECIALLY ONE ASSOCIATED WITH A REPRODUCTIVE STRUCTURE SUCH AS A FLOWER, INFLORESCENCE AXIS OR CONE SCALE
Bracts; Spathe; Involucral bract; Involucre; Bracteole; Involucral; Bracteolate; Bractlet; Prophyll; Prophyllum; Bracteoles; Bractlets; Involucre (botany); Involucral (botany); Bracteate (botany); Cyathophyll; Cyathophylls; Ebracteate; Bractiole
![Bright yellow bracts of ''[[Castilleja levisecta]]'' are more tightly pressed against the stem than bracts of other ''[[Castilleja]]'' species.](https://commons.wikimedia.org/wiki/Special:FilePath/Castilleja levisecta bracts.jpg?width=200 "Bright yellow bracts of ''[[Castilleja levisecta]]'' are more tightly pressed against the stem than bracts of other ''[[Castilleja]]'' species.")
![Bracts of ''[[Bougainvillea glabra]]'', differ in colour from the non-bract leaves, and attract pollinators.](https://commons.wikimedia.org/wiki/Special:FilePath/Bougainvillea glabra.JPG?width=200 "Bracts of ''[[Bougainvillea glabra]]'', differ in colour from the non-bract leaves, and attract pollinators.")
![Bracts along a [[banana]] flower stalk surround the rows of flowers](https://commons.wikimedia.org/wiki/Special:FilePath/Banana bract.jpg?width=200 "Bracts along a [[banana]] flower stalk surround the rows of flowers")
![''[[Euphorbia milii]]'' var. ''vulcanii'' cyathia bearing a pair of pinkish cyathophylls.](https://commons.wikimedia.org/wiki/Special:FilePath/E milii vulcanii ies.jpg?width=200 "''[[Euphorbia milii]]'' var. ''vulcanii'' cyathia bearing a pair of pinkish cyathophylls.")
![Colourful bracts of ''[[Ananas bracteatus]]''.](https://commons.wikimedia.org/wiki/Special:FilePath/Ananas bracteatus var tricolor.jpg?width=200 "Colourful bracts of ''[[Ananas bracteatus]]''.")
![involucral bract]]s of ''[[Erigeron peregrinus]]'' are linear, loose, taper to a point, about the same length, and help to distinguish this species.](https://commons.wikimedia.org/wiki/Special:FilePath/Erigeron peregrinus 6287.JPG?width=200 "involucral bract]]s of ''[[Erigeron peregrinus]]'' are linear, loose, taper to a point, about the same length, and help to distinguish this species.")
![[[Dogwood]] species ''[[Cornus florida]]'' inflorescence showing four large white bracts and central flower cluster.](https://commons.wikimedia.org/wiki/Special:FilePath/Blooming Dogwood.jpg?width=200 "[[Dogwood]] species ''[[Cornus florida]]'' inflorescence showing four large white bracts and central flower cluster.")
![''[[Cornus florida]]'' dogwood [[cultivar]] with pink bracts surrounding small flower cluster.](https://commons.wikimedia.org/wiki/Special:FilePath/2013-05-10 08 26 08 Closeup of pink dogwoods at the Brendan T. Byrne State Forest headquarters.jpg?width=200 "''[[Cornus florida]]'' dogwood [[cultivar]] with pink bracts surrounding small flower cluster.")
![The red bracts of ''[[Aechmea bracteata]]''.](https://commons.wikimedia.org/wiki/Special:FilePath/豔紅苞鳳梨 20190712192436.jpg?width=200 "The red bracts of ''[[Aechmea bracteata]]''.")
![The pink bracts of ''[[Curcuma petiolata]]''.](https://commons.wikimedia.org/wiki/Special:FilePath/女王鬱金 20190715203108 01.jpg?width=200 "The pink bracts of ''[[Curcuma petiolata]]''.")
![The pink bract of a new cultivar: ''[[Anthurium andraeanum]]'' 'Pink Lady'.](https://commons.wikimedia.org/wiki/Special:FilePath/火鶴 20190729181532.jpg?width=200 "The pink bract of a new cultivar: ''[[Anthurium andraeanum]]'' 'Pink Lady'.")
![The inflorescence of ''[[ Alpinia zerumbet]]'' protected by two bracts before flower bloom.](https://commons.wikimedia.org/wiki/Special:FilePath/豔山姜花序總苞 20190508131956.jpg?width=200 "The inflorescence of ''[[ Alpinia zerumbet]]'' protected by two bracts before flower bloom.")
![The golden bracts of ''[[Musella lasiocarpa]]''.](https://commons.wikimedia.org/wiki/Special:FilePath/地湧金蓮 Musella lasiocarpa 20201028130818 01.jpg?width=200 "The golden bracts of ''[[Musella lasiocarpa]]''.")
Involucre
·noun A whorl or set of bracts around a flower, umbel, or head.
II. Involucre ·noun The peridium or volva of certain fungi. Called also involucrum.
III. Involucre ·noun A continuous marginal covering of sporangia, in certain ferns, as in the common brake, or the cup-shaped processes of the filmy ferns.
involucre
['?nv?l(j)u:k?]
¦ noun
1. Anatomy a membranous envelope.
2. Botany a whorl of bracts surrounding an inflorescence or at the base of an umbel.
Origin
C16: from Fr., or from L. involucrum, from involvere (see involve).
Bracteole
·noun ·same·as Bractlet.
Wikipédia
Bract
In botany, a bract is a modified or specialized leaf, especially one associated with a reproductive structure such as a flower, inflorescence axis or cone scale. Bracts are usually different from foliage leaves. They may be smaller, larger, or of a different color, shape, or texture. Typically, they also look different from the parts of the flower, such as the petals or sepals. A plant having bracts is referred to as bracteate or bracteolate, while one that lacks them is referred to as ebracteate and ebracteolate, without bracts.
Exemples du corpus de texte pour involucre
1. Doris Meissner, comisionada del Servicio de Inmigración y Naturalización durante el gobierno Clinton, predijo en una entrevista que el resultado más factible de la creciente presión pública será que departamentos de policía en comunidades pequeñas y medianas participen del programa, mientras que departamentos en ciudades grandes permanecerán desinteresados, al tener suficiente experiencia para "reconocer cuáles son los riesgos de participar". A veces es la comunidad la que exige que la policía se involucre.